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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/display/display_change_observer_x11.h"
#include <algorithm>
#include <map>
#include <set>
#include <vector>
#include <X11/extensions/Xrandr.h>
#include "ash/display/display_controller.h"
#include "ash/display/display_info.h"
#include "ash/display/display_manager.h"
#include "ash/shell.h"
#include "base/message_pump_aurax11.h"
#include "grit/ash_strings.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/x/x11_util.h"
#include "ui/compositor/dip_util.h"
#include "ui/gfx/display.h"
namespace ash {
namespace internal {
namespace {
// The DPI threshold to detect high density screen.
// Higher DPI than this will use device_scale_factor=2.
// Note: This value has to be kept in sync with the mouse/touchpad driver
// which controls mouse pointer acceleration. If you need to update this value,
// please update the bug (crosbug.com/31628) first and make sure that the
// driver will use the same value.
// This value also has to be kept in sync with the value in
// chromeos/display/output_configurator.cc. See crbug.com/130188
const unsigned int kHighDensityDPIThreshold = 160;
// 1 inch in mm.
const float kInchInMm = 25.4f;
XRRModeInfo* FindMode(XRRScreenResources* screen_resources, XID current_mode) {
for (int m = 0; m < screen_resources->nmode; m++) {
XRRModeInfo *mode = &screen_resources->modes[m];
if (mode->id == current_mode)
return mode;
}
return NULL;
}
// A list of bogus sizes in mm that X detects and should be ignored.
// See crbug.com/136533.
const unsigned long kInvalidDisplaySizeList[][2] = {
{160, 100},
{160, 90},
{50, 40},
{40, 30},
};
// Returns true if the size nifo in the output_info isn't valid
// and should be ignored.
bool ShouldIgnoreSize(XRROutputInfo *output_info) {
if (output_info->mm_width == 0 || output_info->mm_height == 0) {
LOG(WARNING) << "No display size available";
return true;
}
for (unsigned long i = 0 ; i < arraysize(kInvalidDisplaySizeList); ++i) {
const unsigned long* size = kInvalidDisplaySizeList[i];
if (output_info->mm_width == size[0] && output_info->mm_height == size[1]) {
LOG(WARNING) << "Black listed display size detected:"
<< size[0] << "x" << size[1];
return true;
}
}
return false;
}
std::string GetDisplayName(XID output_id) {
std::string display_name;
ui::GetOutputDeviceData(output_id, NULL, NULL, &display_name);
return display_name;
}
int64 GetDisplayId(XID output_id, int output_index) {
uint16 manufacturer_id = 0;
uint16 product_code = 0;
if (ui::GetOutputDeviceData(
output_id, &manufacturer_id, &product_code, NULL) &&
manufacturer_id != 0) {
// An ID based on display's index will be assigned later if this call
// fails.
return gfx::Display::GetID(manufacturer_id, product_code, output_index);
}
return gfx::Display::kInvalidDisplayID;
}
} // namespace
DisplayChangeObserverX11::DisplayChangeObserverX11()
: xdisplay_(base::MessagePumpAuraX11::GetDefaultXDisplay()),
x_root_window_(DefaultRootWindow(xdisplay_)),
xrandr_event_base_(0) {
int error_base_ignored;
XRRQueryExtension(xdisplay_, &xrandr_event_base_, &error_base_ignored);
// Find internal display.
XRRScreenResources* screen_resources =
XRRGetScreenResources(xdisplay_, x_root_window_);
for (int output_index = 0; output_index < screen_resources->noutput;
output_index++) {
XID output = screen_resources->outputs[output_index];
XRROutputInfo *output_info =
XRRGetOutputInfo(xdisplay_, screen_resources, output);
bool is_internal = chromeos::OutputConfigurator::IsInternalOutputName(
std::string(output_info->name));
XRRFreeOutputInfo(output_info);
if (is_internal) {
int64 id = GetDisplayId(output, output_index);
// Fallback to output index. crbug.com/180100
gfx::Display::SetInternalDisplayId(
id == gfx::Display::kInvalidDisplayID ? output_index : id);
break;
}
}
XRRFreeScreenResources(screen_resources);
}
DisplayChangeObserverX11::~DisplayChangeObserverX11() {
}
chromeos::OutputState DisplayChangeObserverX11::GetStateForOutputs(
const std::vector<chromeos::OutputInfo>& outputs) const {
CHECK(outputs.size() == 2);
DisplayIdPair pair = std::make_pair(
GetDisplayId(outputs[0].output, outputs[0].output_index),
GetDisplayId(outputs[1].output, outputs[1].output_index));
DisplayLayout layout = Shell::GetInstance()->display_controller()->
GetRegisteredDisplayLayout(pair);
return layout.mirrored ?
chromeos::STATE_DUAL_MIRROR : chromeos::STATE_DUAL_EXTENDED;
}
void DisplayChangeObserverX11::OnDisplayModeChanged() {
XRRScreenResources* screen_resources =
XRRGetScreenResources(xdisplay_, x_root_window_);
std::map<XID, XRRCrtcInfo*> crtc_info_map;
for (int c = 0; c < screen_resources->ncrtc; c++) {
XID crtc_id = screen_resources->crtcs[c];
XRRCrtcInfo *crtc_info =
XRRGetCrtcInfo(xdisplay_, screen_resources, crtc_id);
crtc_info_map[crtc_id] = crtc_info;
}
std::vector<DisplayInfo> displays;
std::set<int64> ids;
for (int output_index = 0; output_index < screen_resources->noutput;
output_index++) {
XID output = screen_resources->outputs[output_index];
XRROutputInfo *output_info =
XRRGetOutputInfo(xdisplay_, screen_resources, output);
if (output_info->connection != RR_Connected) {
XRRFreeOutputInfo(output_info);
continue;
}
XRRCrtcInfo* crtc_info = crtc_info_map[output_info->crtc];
if (!crtc_info) {
LOG(WARNING) << "Crtc not found for output: output_index="
<< output_index;
continue;
}
XRRModeInfo* mode = FindMode(screen_resources, crtc_info->mode);
if (!mode) {
LOG(WARNING) << "Could not find a mode for the output: output_index="
<< output_index;
continue;
}
float device_scale_factor = 1.0f;
if (!ShouldIgnoreSize(output_info) &&
(kInchInMm * mode->width / output_info->mm_width) >
kHighDensityDPIThreshold) {
device_scale_factor = 2.0f;
}
gfx::Rect display_bounds(
crtc_info->x, crtc_info->y, mode->width, mode->height);
bool is_internal = chromeos::OutputConfigurator::IsInternalOutputName(
std::string(output_info->name));
XRRFreeOutputInfo(output_info);
std::string name = is_internal ?
l10n_util::GetStringUTF8(IDS_ASH_INTERNAL_DISPLAY_NAME) :
GetDisplayName(output);
if (name.empty())
name = l10n_util::GetStringUTF8(IDS_ASH_STATUS_TRAY_UNKNOWN_DISPLAY_NAME);
bool has_overscan = false;
ui::GetOutputOverscanFlag(output, &has_overscan);
int64 id = GetDisplayId(output, output_index);
// If ID is invalid or there is an duplicate, just use output index.
if (id == gfx::Display::kInvalidDisplayID || ids.find(id) != ids.end())
id = output_index;
ids.insert(id);
displays.push_back(DisplayInfo(id, name, has_overscan));
displays.back().set_device_scale_factor(device_scale_factor);
displays.back().SetBounds(display_bounds);
displays.back().set_native(true);
}
// Free all allocated resources.
for (std::map<XID, XRRCrtcInfo*>::const_iterator iter = crtc_info_map.begin();
iter != crtc_info_map.end(); ++iter) {
XRRFreeCrtcInfo(iter->second);
}
XRRFreeScreenResources(screen_resources);
// DisplayManager can be null during the boot.
Shell::GetInstance()->display_manager()->OnNativeDisplaysChanged(displays);
}
} // namespace internal
} // namespace ash
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